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Kolur V, Vastrad B, Vastrad C, Kotturshetti S, Tengli A. Identification of candidate biomarkers and therapeutic agents for heart failure by bioinformatics analysis. BMC Cardiovasc Disord 2021; 21:329. [PMID: 34218797 PMCID: PMC8256614 DOI: 10.1186/s12872-021-02146-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 06/14/2021] [Indexed: 02/07/2023] Open
Abstract
INTRODUCTION Heart failure (HF) is a heterogeneous clinical syndrome and affects millions of people all over the world. HF occurs when the cardiac overload and injury, which is a worldwide complaint. The aim of this study was to screen and verify hub genes involved in developmental HF as well as to explore active drug molecules. METHODS The expression profiling by high throughput sequencing of GSE141910 dataset was downloaded from the Gene Expression Omnibus (GEO) database, which contained 366 samples, including 200 heart failure samples and 166 non heart failure samples. The raw data was integrated to find differentially expressed genes (DEGs) and were further analyzed with bioinformatics analysis. Gene ontology (GO) and REACTOME enrichment analyses were performed via ToppGene; protein-protein interaction (PPI) networks of the DEGs was constructed based on data from the HiPPIE interactome database; modules analysis was performed; target gene-miRNA regulatory network and target gene-TF regulatory network were constructed and analyzed; hub genes were validated; molecular docking studies was performed. RESULTS A total of 881 DEGs, including 442 up regulated genes and 439 down regulated genes were observed. Most of the DEGs were significantly enriched in biological adhesion, extracellular matrix, signaling receptor binding, secretion, intrinsic component of plasma membrane, signaling receptor activity, extracellular matrix organization and neutrophil degranulation. The top hub genes ESR1, PYHIN1, PPP2R2B, LCK, TP63, PCLAF, CFTR, TK1, ECT2 and FKBP5 were identified from the PPI network. Module analysis revealed that HF was associated with adaptive immune system and neutrophil degranulation. The target genes, miRNAs and TFs were identified from the target gene-miRNA regulatory network and target gene-TF regulatory network. Furthermore, receiver operating characteristic (ROC) curve analysis and RT-PCR analysis revealed that ESR1, PYHIN1, PPP2R2B, LCK, TP63, PCLAF, CFTR, TK1, ECT2 and FKBP5 might serve as prognostic, diagnostic biomarkers and therapeutic target for HF. The predicted targets of these active molecules were then confirmed. CONCLUSION The current investigation identified a series of key genes and pathways that might be involved in the progression of HF, providing a new understanding of the underlying molecular mechanisms of HF.
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Affiliation(s)
- Vijayakrishna Kolur
- Vihaan Heart Care & Super Specialty Centre, Vivekananda General Hospital, Deshpande Nagar, Hubli, Karnataka, 580029, India
| | - Basavaraj Vastrad
- Department of Biochemistry, Basaveshwar College of Pharmacy, Gadag, Karnataka, 582103, India
| | - Chanabasayya Vastrad
- Biostatistics and Bioinformatics, Chanabasava Nilaya, Bharthinagar, Dharwad, 580001, Karnataka, India.
| | - Shivakumar Kotturshetti
- Biostatistics and Bioinformatics, Chanabasava Nilaya, Bharthinagar, Dharwad, 580001, Karnataka, India
| | - Anandkumar Tengli
- Department of Pharmaceutical Chemistry, JSS College of Pharmacy, Mysuru and JSS Academy of Higher Education & Research, Mysuru, Karnataka, 570015, India
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Al-Shaer AE, Buddenbaum N, Shaikh SR. Polyunsaturated fatty acids, specialized pro-resolving mediators, and targeting inflammation resolution in the age of precision nutrition. Biochim Biophys Acta Mol Cell Biol Lipids 2021; 1866:158936. [PMID: 33794384 PMCID: PMC8496879 DOI: 10.1016/j.bbalip.2021.158936] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 03/17/2021] [Accepted: 03/24/2021] [Indexed: 12/16/2022]
Abstract
Chronic inflammation contributes toward the pathogenesis of numerous diseases including, but not limited to, obesity, autoimmunity, cardiovascular diseases, and cancers. The discovery of specialized pro-resolving mediators (SPMs), which are critical for resolving inflammation, has commenced investigation into targeting pathways of inflammation resolution to improve physiological outcomes. SPMs are predominately synthesized from the n-3 polyunsaturated fatty acids (PUFA) eicosapentaenoic (EPA) and docosahexaenoic (DHA) acids. Therefore, one viable strategy to promote inflammation resolution would be to increase dietary intake of EPA/DHA, which are deficient in select populations. However, there are inconsistencies between the use of EPA/DHA as dietary or pharmacological supplements and improved inflammatory status. Herein, we review the literature on the relationship between the high n-6/n-3 PUFA ratio, downstream SPM biosynthesis, and inflammatory endpoints. We highlight key studies that have investigated how dietary intake of EPA/DHA increase tissue SPMs and their effects on inflammation. We also discuss the biochemical pathways by which EPA/DHA drive SPM biosynthesis and underscore mechanistic gaps in knowledge about these pathways which include a neglect for host genetics/ethnic differences in SPM metabolism, sexual dimorphism in SPM levels, and potential competition from select dietary n-6 PUFAs for enzymes of SPM synthesis. Altogether, establishing how dietary PUFAs control SPM biosynthesis in a genetic- and sex-dependent manner will drive new precision nutrition studies with EPA/DHA to prevent chronic inflammation in select populations.
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Affiliation(s)
- Abrar E Al-Shaer
- Department of Nutrition, Gillings School of Global Public Health and School of Medicine, The University of North Carolina at Chapel Hill, 170 Rosenau Hall, CB# 7400, 135 Dauer Drive, Chapel Hill, NC, USA
| | - Nicole Buddenbaum
- Department of Nutrition, Gillings School of Global Public Health and School of Medicine, The University of North Carolina at Chapel Hill, 170 Rosenau Hall, CB# 7400, 135 Dauer Drive, Chapel Hill, NC, USA
| | - Saame Raza Shaikh
- Department of Nutrition, Gillings School of Global Public Health and School of Medicine, The University of North Carolina at Chapel Hill, 170 Rosenau Hall, CB# 7400, 135 Dauer Drive, Chapel Hill, NC, USA.
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Genetic Risk Assessment for Atherosclerotic Cardiovascular Disease: A Guide for the General Cardiologist. Cardiol Rev 2021; 30:206-213. [PMID: 33758125 DOI: 10.1097/crd.0000000000000384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Genetic testing for cardiovascular (CV) disease has had a profound impact on the diagnosis and evaluation of monogenic causes of CV disease, such as hypertrophic and familial cardiomyopathies, long QT syndrome, and familial hypercholesterolemia (FH). The success in genetic testing for monogenic diseases has prompted special interest in utilizing genetic information in the risk assessment of more common diseases such as atherosclerotic cardiovascular disease (ASCVD). Polygenic risk scores (PRS) have been developed to assess the risk of coronary artery disease (CAD) that now include millions of single-nucleotide polymorphisms (SNPs) that have been identified through genome-wide association studies (GWAS). While these PRS have demonstrated a strong association with CAD in large cross-sectional population studies, there remains intense debate regarding the added value that PRS contribute to existing clinical risk prediction models such as the pooled cohort equations (PCEs). In this review, we provide a brief background of genetic testing for monogenic drivers of CV disease and then focus on the recent developments in genetic risk assessment of ASCVD, including the use of PRS. We outline the genetic testing that is currently available to all cardiologists in the clinic and discuss the evolving sphere of specialized cardiovascular genetics programs (CVGPs) that integrate the expertise of cardiologists, geneticists, and genetic counselors. Finally, we review the possible implications that PRS and pharmacogenomic data may soon have on clinical practice in the care for patients with or at risk of developing ASCVD.
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Almeida SO, Ram RJ, Kinninger A, Budoff MJ. Effect of 5-lipoxygenase inhibitor, VIA-2291 (Atreleuton), on epicardial fat volume in patients with recent acute coronary syndrome. J Cardiovasc Comput Tomogr 2020; 14:343-348. [DOI: 10.1016/j.jcct.2019.12.033] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 12/21/2019] [Accepted: 12/24/2019] [Indexed: 12/01/2022]
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Cilenšek I, Šeruga M, Makuc J, Završnik M, Petrovič D. The ALOXA5AP gene (rs38022789) is associated with diabetic nephropathy in Slovenian patients with type 2 diabetes mellitus. Gene 2020; 741:144551. [PMID: 32165305 DOI: 10.1016/j.gene.2020.144551] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 10/08/2019] [Accepted: 03/08/2020] [Indexed: 01/11/2023]
Abstract
BACKGROUND Although the pathogenesis of diabetic nephropathy (DN) is multifactorial, and the precise mechanisms are unclear, there is a growing body of evidence suggesting that inflammatory processes and immune cells might be involved in the development and progression of DN. Leukotrienes (LTs) are a family of lipid mediators, which act as pro-inflammatory mediators. The study was designed to investigate the association between the polymorphism of the ALOX5 gene (rs12762303) and the ALOX5AP gene (rs3802278), and DN in patients with T2DM. METHODOLOGY 651 subjects with diabetes mellitus type 2 (T2DM) were classified into two groups according to the presence of DN, and tested for ALOX5 and ALOX5AP gene polymorphisms using the KASPar genotyping chemistry with validated assay. Biochemical analyses were performed using standard biochemical methods. RESULTS Logistic regression analysis demonstrated that the carriers of the CC genotype had a 3.14 higher risk for DN compared to TT genotype. Serum cystatin C was found to be statistically significantly higher in cases with DN in comparison with subjects without DN (p < 0.001). CONCLUSION An association between the rs3803278 of the ALOX5AP gene and DN was found in Slovenian patients with T2DM. The rs3803278 CC allele appears to confer increased risk of DN possibly by increasing the production of LTs-potent drivers of inflammation.
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Affiliation(s)
- Ines Cilenšek
- Institute of Histology and Embryology, Faculty of Medicine, University of Ljubljana, Slovenia.
| | - Maja Šeruga
- Department of Internal Medicine, General Hospital Murska Sobota, Murska Sobota, Slovenia
| | - Jana Makuc
- Department of Internal Medicine, General Hospital Slovenj Gradec, Slovenj Gradec, Slovenia
| | - Matej Završnik
- Department for Diabetes and Metabolic Diseases, Clinic for Internal Medicine, University Medical Centre Maribor, Maribor, Slovenia
| | - Danijel Petrovič
- Institute of Histology and Embryology, Faculty of Medicine, University of Ljubljana, Slovenia
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Nejatian N, Häfner AK, Shoghi F, Badenhoop K, Penna-Martinez M. 5-Lipoxygenase (ALOX5): Genetic susceptibility to type 2 diabetes and vitamin D effects on monocytes. J Steroid Biochem Mol Biol 2019; 187:52-57. [PMID: 30521849 DOI: 10.1016/j.jsbmb.2018.10.022] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 10/28/2018] [Accepted: 10/31/2018] [Indexed: 12/22/2022]
Abstract
The arachidonate 5-lipoxygenase (ALOX5) pathway has been implicated in chronic inflammatory disease which may be influenced by vitamin D due to vitamin D response elements (VDRE). We investigated an ALOX5 polymorphism (rs4987105) in patients with type 2 diabetes (T2D) and the in vitro effects of calcitriol (1,25(OH)2D3) on ALOX5 metabolism in monocytes of T2D patients and healthy controls (HC). 533 T2D and 473 HC were genotyped for the rs4987105 polymorphism. In addition, the 25(OH)D3 and 1,25(OH)2D3 plasma levels were measured in both cohorts. Further C-reactive protein (CRP) was determined in T2D patients. Our results demonstrate, that genotype CC and the allele C of ALOX5 rs4987105 polymorphism were more frequent in T2D compared to HC (OR = 1.44; 95% CI: 1.12-1.84; p < 0.05). Lower levels of both vitamin D metabolites (p < 0.0001 respectively) were found in the CC genotyped T2D patients compared to CC genotyped HC. In addition, CC genotyped T2D patients had higher levels of CRP compared to CT and TT genotyped T2D patients, (p < 0.01). In order to evaluate the impact of calcitriol in primary isolated monocytes, we isolated monocytes of 20 T2D patients and 20 HC. The cells were treated with 1,25(OH)2D3 and interleukin-1beta (IL-1β) for 24 h. The following genes were analysed for expression changes: ALOX5, leukotriene A4 hydrolase (LTA4H), leukotriene B4 receptor type 1 (LTB4R1) and CD14. Treatment with IL-1β+1,25(OH)2D3 increased ALOX5, LTA4H and LTB4R1 and CD14 mRNA in both T2D patients and HC (p < 0.0001, respectively). In addition, IL-1β+1,25(OH)2D3 treatment led to higher ALOX5, LTA4H and CD14 mRNA levels in T2D patients compared to HC (p < 0.001, p < 0.05, p ≤ 0.05, respectively). In conclusion, ALOX5 rs4987105 allele C confers susceptibility to T2D, lower vitamin D metabolites and higher CRP levels complement this association. Additionally, IL-1β+1,25(OH)2D3 treatment on, ALOX5, LTA4H and CD14 mRNA indicate a diabetes specific modulation. These findings identify a novel pathway in T2D potentially amenable for individualized therapeutic targeting.
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Affiliation(s)
- Nojan Nejatian
- Department of Internal Medicine I, Division of Endocrinology, Diabetes and Metabolism, Goethe University Hospital, Frankfurt am Main, Germany.
| | - Ann-Kathrin Häfner
- Institute of Pharmaceutical Chemistry, University of Frankfurt, Frankfurt am Main, Germany
| | - Firouzeh Shoghi
- Department of Internal Medicine I, Division of Endocrinology, Diabetes and Metabolism, Goethe University Hospital, Frankfurt am Main, Germany
| | - Klaus Badenhoop
- Department of Internal Medicine I, Division of Endocrinology, Diabetes and Metabolism, Goethe University Hospital, Frankfurt am Main, Germany
| | - Marissa Penna-Martinez
- Department of Internal Medicine I, Division of Endocrinology, Diabetes and Metabolism, Goethe University Hospital, Frankfurt am Main, Germany
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Heidari L, Ghaderian SMH, Vakili H, Salmani TA. Promoter methylation and functional variants in arachidonate 5-lipoxygenase and forkhead box protein O1 genes associated with coronary artery disease. J Cell Biochem 2019; 120:12360-12368. [PMID: 30825235 DOI: 10.1002/jcb.28501] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Revised: 12/10/2018] [Accepted: 12/14/2018] [Indexed: 01/08/2023]
Abstract
Coronary artery disease (CAD) is a multifactorial chronic inflammatory disease, which is the most common form of heart disease. This is one of the main causes of death in the United States. Inflammation is one of the key drivers of atherosclerotic plaque development. Forkhead box protein O1 (FOXO1s) family and 5-lipoxygenase make an important contribution to atherosclerosis. The aim of this study was to investigate the methylation pattern and polymorphism analysis of FOXO1 and arachidonate 5-lipoxygenase (ALOX5) promoter genes. We studied 50 patients with CAD and 50 age- and sex-matched healthy controls by high resolution melt technique. Overall, we found significant differences between patients and controls in terms of the promoter methylation of ALOX5 (P > 0.05). But there was no significant difference in FOXO1 promoter methylation between patient and controls. Single nucleotide polymorphisms genotyping of rs12762303 and rs2297627, in ALOX5 and FOXO1 genes were demonstrated a significant correlation between mutant allele and the risk of CAD, respectively. Furthermore, there were significant associations between CT + CC genotype and ALOX5 expression. Our findings demonstrated functional effects of single nucleotide polymorphisms (SNPs) and DNA methylation in ALOX5 on mentioned genes expression and they resulted in CAD progression.
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Affiliation(s)
- Laleh Heidari
- Department of Medical Genetics, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Sayyed Mohammad Hossein Ghaderian
- Department of Medical Genetics, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Urogenital Stem Cell Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hossein Vakili
- Modarres Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Tayyeb Ali Salmani
- Department of Medical Genetics, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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van der Krieken SE, Popeijus HE, Bendik I, Böhlendorf B, Konings MCJM, Tayyeb J, Mensink RP, Plat J. Large-Scale Screening of Natural Products Transactivating Peroxisome Proliferator-Activated Receptor α Identifies 9S-Hydroxy-10E,12Z,15Z-Octadecatrienoic Acid and Cymarin as Potential Compounds Capable of Increasing Apolipoprotein A-I Transcription in Hum. Lipids 2019; 53:1021-1030. [DOI: 10.1002/lipd.12116] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 10/18/2018] [Accepted: 11/27/2018] [Indexed: 01/16/2023]
Affiliation(s)
- Sophie E. van der Krieken
- NUTRIM School of Nutrition and Translational Research in Metabolism, Department of Nutrition and Movement Sciences; Maastricht University; PO Box 616, 6200 MD, Maastricht The Netherlands
| | - Herman E. Popeijus
- NUTRIM School of Nutrition and Translational Research in Metabolism, Department of Nutrition and Movement Sciences; Maastricht University; PO Box 616, 6200 MD, Maastricht The Netherlands
| | - Igor Bendik
- DSM Nutritional Products Ltd, Research and Development, Human Nutrition and Health; PO Box 2676, Basel Switzerland
| | - Bettina Böhlendorf
- DSM Nutritional Products Ltd, Research and Development, Human Nutrition and Health; PO Box 2676, Basel Switzerland
| | - Maurice C. J. M. Konings
- NUTRIM School of Nutrition and Translational Research in Metabolism, Department of Nutrition and Movement Sciences; Maastricht University; PO Box 616, 6200 MD, Maastricht The Netherlands
| | - Jehad Tayyeb
- NUTRIM School of Nutrition and Translational Research in Metabolism, Department of Nutrition and Movement Sciences; Maastricht University; PO Box 616, 6200 MD, Maastricht The Netherlands
| | - Ronald P. Mensink
- NUTRIM School of Nutrition and Translational Research in Metabolism, Department of Nutrition and Movement Sciences; Maastricht University; PO Box 616, 6200 MD, Maastricht The Netherlands
| | - Jogchum Plat
- NUTRIM School of Nutrition and Translational Research in Metabolism, Department of Nutrition and Movement Sciences; Maastricht University; PO Box 616, 6200 MD, Maastricht The Netherlands
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Li Y, Xu X, Zhang D, Cheng W, Zhang Y, Yu B, Zhang Y. Genetic variation in the leukotriene pathway is associated with myocardial infarction in the Chinese population. Lipids Health Dis 2019; 18:25. [PMID: 30678701 PMCID: PMC6346589 DOI: 10.1186/s12944-019-0968-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 01/08/2019] [Indexed: 01/03/2023] Open
Abstract
Background Genetic variation in the genes ALOX5 (arachidonate 5-lipoxygenase), ALOX5AP (arachidonate 5-lipoxygenase-activating protein) and LTA4H (leukotriene A4 hydrolase) has previously been shown to contribute to the risk of MI (myocardial infarction) in Caucasian and African American populations. All genes encode proteins playing a role in the synthesis of the pro-inflammatory leukotriene B mediators, possibly providing a link between MI and inflammation. The aim of the present study was to investigate whether these associations could be confirmed in the study of China MI patients. The study included 401 Han Chinese MI patients and 409 controls. Six tag single nucleotide polymorphisms (SNPs)—ALOX5 rs12762303 and rs12264801, ALOX5AP rs10507391, LTA4H rs2072512, rs2540487 and rs2540477—were selected. SNP genotyping was performed by an improved multiplex ligation detection reaction assay. Results The rs2540487 genotype was associated with the risk of MI in overdominant model (P = 0.008). rs12762303 and rs10507391 SNPs were significantly associated with lipid levels in MI patients (P < 0.006–0.008). Several SNPs interacted with alcohol consumption, cigarette smoking, and hypertension to modify TC, TG, LDL-C and CRE levels, and the risk of MI (P < 0.0017 for all). No association between the SNPs of LT pathway and susceptibility to MI was found (P > 0.05 for all). Conclusions Taken together, this study provides additional evidence that functional genetic variation of the LT pathway can mediate atherogenic processes and the risk of MI in Chinese.
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Affiliation(s)
- Yilan Li
- Department of Cardiology, the 2nd Affiliated Hospital of Harbin Medical University, Harbin, 150001, China.,Key Laboratory of Myocardial Ischemia, Ministry of Education, Harbin Medical University, Harbin, 150001, China
| | - Xueming Xu
- Department of Cardiology, the 2nd Affiliated Hospital of Harbin Medical University, Harbin, 150001, China.,Key Laboratory of Myocardial Ischemia, Ministry of Education, Harbin Medical University, Harbin, 150001, China
| | - Dandan Zhang
- Department of Cardiology, the 2nd Affiliated Hospital of Harbin Medical University, Harbin, 150001, China.,Key Laboratory of Myocardial Ischemia, Ministry of Education, Harbin Medical University, Harbin, 150001, China
| | - Wei Cheng
- Department of Cardiology, the 2nd Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
| | - Yanan Zhang
- Department of Cardiology, Heilongjiang Provincial Hospital, Harbin, 150001, China
| | - Bo Yu
- Department of Cardiology, the 2nd Affiliated Hospital of Harbin Medical University, Harbin, 150001, China.,Key Laboratory of Myocardial Ischemia, Ministry of Education, Harbin Medical University, Harbin, 150001, China
| | - Yao Zhang
- Department of Cardiology, the 2nd Affiliated Hospital of Harbin Medical University, Harbin, 150001, China. .,Key Laboratory of Myocardial Ischemia, Ministry of Education, Harbin Medical University, Harbin, 150001, China.
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Araújo AC, Wheelock CE, Haeggström JZ. The Eicosanoids, Redox-Regulated Lipid Mediators in Immunometabolic Disorders. Antioxid Redox Signal 2018; 29:275-296. [PMID: 28978222 DOI: 10.1089/ars.2017.7332] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
SIGNIFICANCE The oxidation of arachidonic acid via cyclooxygenase (COX) and lipoxygenase (LOX) activity to produce eicosanoids during inflammation is a well-known biosynthetic pathway. These lipid mediators are involved in fever, pain, and thrombosis and are produced from multiple cells as well as cell/cell interactions, for example, immune cells and epithelial/endothelial cells. Metabolic disorders, including hyperlipidemia, hypertension, and diabetes, are linked with chronic low-grade inflammation, impacting the immune system and promoting a variety of chronic diseases. Recent Advances: Multiple studies have corroborated the important function of eicosanoids and their receptors in (non)-inflammatory cells in immunometabolic disorders (e.g., insulin resistance, obesity, and cardiovascular and nonalcoholic fatty liver diseases). In this context, LOX and COX products are involved in both pro- and anti-inflammatory responses. In addition, recent work has elucidated the potent function of specialized proresolving mediators (i.e., lipoxins and resolvins) in resolving inflammation, protecting organs, and stimulating tissue repair and remodeling. CRITICAL ISSUES Inhibiting/stimulating selected eicosanoid pathways may result in anti-inflammatory and proresolution responses leading to multiple beneficial effects, including the abrogation of reactive oxygen species production, increased speed of resolution, and overall improvement of diseases related to immunometabolic perturbations. FUTURE DIRECTIONS Despite many achievements, it is crucial to understand the molecular and cellular mechanisms underlying immunological/metabolic cross talk to offer substantial therapeutic promise. Antioxid. Redox Signal. 29, 275-296.
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Affiliation(s)
- Ana Carolina Araújo
- Division of Physiological Chemistry II, Department of Medical Biochemistry and Biophysics, Karolinska Institutet , Stockholm, Sweden
| | - Craig E Wheelock
- Division of Physiological Chemistry II, Department of Medical Biochemistry and Biophysics, Karolinska Institutet , Stockholm, Sweden
| | - Jesper Z Haeggström
- Division of Physiological Chemistry II, Department of Medical Biochemistry and Biophysics, Karolinska Institutet , Stockholm, Sweden
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Kaur N, Singh J, Reddy S. Interaction between ALOX15 polymorphisms and coronary artery disease in North Indian population. Clin Exp Hypertens 2017; 40:398-405. [DOI: 10.1080/10641963.2017.1384485] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Naindeep Kaur
- Department of Biotechnology, Panjab University, Chandigarh, India
| | - Jagtar Singh
- Department of Biotechnology, Panjab University, Chandigarh, India
| | - Sreenivas Reddy
- Department of Cardiology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
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Common Polymorphisms in the 5-Lipoxygenase Pathway and Risk of Incident Myocardial Infarction: A Danish Case-Cohort Study. PLoS One 2016; 11:e0167217. [PMID: 27893808 PMCID: PMC5125697 DOI: 10.1371/journal.pone.0167217] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Accepted: 11/10/2016] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND The 5-lipoxygenase pathway (5-LOX) has been implicated in the development of cardiovascular disease and studies have suggested that genetic polymorphisms related to key enzymes in this pathway may confer risk of myocardial infarction (MI). This study investigated the association of pre-selected genetic polymorphisms in four candidate genes of 5-LOX (arachidonate 5-lipoxygenase and its activating protein (ALOX-5 and FLAP), leukotriene A4 hydroxylase (LTA4-H) and leukotriene C4 synthase (LTC4-S)) with incident MI. METHODS In a Danish cohort including 57,053 participants, aged 50-64 at enrolment and recruited from 1993-97, we conducted a case-cohort study including cases with incident MI and a randomly selected sub cohort of 3,000 participants. Cases were identified from national registries through July 2013. A total of 22 SNPs were selected and genotyped using the commercially available KASP™ assay. A tandem-repeat polymorphism, located in the ALOX-5 gene, was genotyped by multi-titre plate sequencing. Haplotypes were inferred using PHASE 2.1. RESULTS During a median follow-up of 17.0 years we identified 3,089 cases of incident MI. In FLAP, two SNPs were negatively associated with incident MI (rs9551963 & rs17222842) while one SNP (rs2247570) located in LTA4-H, was associated with higher risk of MI when comparing subjects with two copies of the variant allele to homozygotes for the wild type. However, only rs17222842 remained significantly associated with MI after correcting for multiple testing. Furthermore, the promoter polymorphism rs59439148 was associated with risk of MI in men. For male carriers of two variant alleles we found a hazard ratio of 1.63 (95% CI: 1.06;2.52) compared to homozygotes for the wild type. Previously described haplotypes (Hap-A -B, -E and -K) were not associated with MI in our population. CONCLUSION In conclusion, some common polymorphisms in the 5-lipoxygenase pathway were modestly associated with incident MI, suggesting a potential role for this pathway in the development of cardiovascular disease.
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Monge A, Harris WS, Ortiz-Panozo E, Yunes E, Cantu-Brito C, Catzin-Kuhlmann A, López-Ridaura R, Lajous M. Whole Blood ω-3 Fatty Acids Are Inversely Associated with Carotid Intima-Media Thickness in Indigenous Mexican Women. J Nutr 2016; 146:1365-72. [PMID: 27281801 DOI: 10.3945/jn.115.227264] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Accepted: 04/25/2016] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Long-chain ω-3 (n-3) polyunsaturated fatty acids (PUFAs) may reduce the risk of atherosclerosis. The association between n-3 PUFAs and cardiovascular disease may vary across different populations, and there is limited information on Hispanic individuals with mixed Amerindian and European origin. OBJECTIVE We evaluated the cross-sectional relations between whole blood n-3 PUFAs and carotid intima-media thickness (IMT) in Mexican women living in Mexico and assessed whether this relation was different in women who spoke an indigenous language compared with women who did not. METHODS In 2012-2013, we assessed the association between blood n-3 PUFAs and IMT in 1306 women free of disease in Chiapas and Yucatan, Mexico. We categorized blood n-3 PUFAs (% of total FAs) in quartiles and adjusted linear regression models by age, indigenous language, site, socioeconomic status, education, smoking, menopause, diabetes, hypertension, hypercholesterolemia, body mass index, physical activity, and diet. We stratified analyses by indigenous/nonindigenous language speakers (n = 315 of 991). RESULTS Whole blood n-3 PUFAs (means ± SDs) were 3.58% ± 0.78% of total FAs. We did not observe a significant association between n-3 PUFAs and IMT in the overall study population. However, the adjusted mean difference of IMT was -6.5% (95% CI: -10.7%, -2.3%; P-trend < 0.0001) for indigenous women in the highest quartile compared with the lowest quartile of blood n-3 PUFAs. In nonindigenous women, we did not observe an association (-0.6%; 95% CI: -3.0%, 1.8%, comparing extreme quartiles; P-trend = 1.00). CONCLUSIONS Overall, circulating n-3 PUFAs were not associated with IMT. However, we observed a strong statistically significant inverse association with IMT in indigenous Mexican women. Future studies should evaluate genetic markers that may reflect differences in n-3 PUFA metabolism across populations.
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Affiliation(s)
- Adriana Monge
- Center for Research on Population Health, National Institute of Public Health, Cuernavaca, Mexico
| | - William S Harris
- Sanford School of Medicine, University of South Dakota, Sioux Falls, SD; OmegaQuant Analytics, LLC, Sioux Falls, SD
| | - Eduardo Ortiz-Panozo
- Center for Research on Population Health, National Institute of Public Health, Cuernavaca, Mexico
| | - Elsa Yunes
- Center for Research on Population Health, National Institute of Public Health, Cuernavaca, Mexico
| | - Carlos Cantu-Brito
- National Institute of Medical Sciences and Nutrition, Mexico City, Mexico; and
| | | | - Ruy López-Ridaura
- Center for Research on Population Health, National Institute of Public Health, Cuernavaca, Mexico
| | - Martín Lajous
- Center for Research on Population Health, National Institute of Public Health, Cuernavaca, Mexico; Department of Global Health and Population, Harvard T.H. Chan School of Public Health, Boston, MA
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Tsai MY, Cao J, Steffen BT, Weir NL, Rich SS, Liang S, Guan W. 5-Lipoxygenase Gene Variants Are Not Associated With Atherosclerosis or Incident Coronary Heart Disease in the Multi-Ethnic Study of Atherosclerosis Cohort. J Am Heart Assoc 2016; 5:e002814. [PMID: 27025886 PMCID: PMC4943258 DOI: 10.1161/jaha.115.002814] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background The arachidonate 5‐lipoxygenase enzyme plays a crucial role in mediating inflammation to maintain homeostasis, yet certain allelic variants of the 5‐lipoxygenase gene, ALOX5, may increase risk of atherosclerosis and coronary heart disease (CHD). Further, relations between ALOX5 and disease outcomes may be enhanced or attenuated depending on the bioavailability of 5‐lipoxygenase enzyme substrates. By using a candidate gene approach in 6153 Multi‐Ethnic Study of Atherosclerosis (MESA) participants, associations were determined among 1348 ALOX5 single nucleotide polymorphisms (SNPs) and carotid intima‐media thickness (cIMT) as well as incident CHD, and interactions with plasma concentrations of arachidonic acid, eicosapentaenoic acid, or docosahexaenoic acid were tested. Methods and Results Multivariable linear regression was used to test for associations between cIMT and ALOX5 SNPs, and Cox regression was used for incident CHD. Bonferroni correction was used for multiple hypothesis testing. No significant associations between ALOX5 SNPs and cIMT or CHD events were observed. Levels of arachidonic acid, eicosapentaenoic acid, or docosahexaenoic acid concentrations did not modify the relations of ALOX5 with either outcome. Conclusions ALOX5 gene variants do not appear to be related to clinical CHD events or subclinical atherosclerosis regardless of bioavailable enzyme substrate levels in this multiethnic cohort. Further studies that directly examine protein expression or enzyme activity may better define the arachidonate 5‐lipoxygenase pathway in disease development and progression.
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Affiliation(s)
- Michael Y Tsai
- Department of Laboratory Medicine and Pathology, University of Minnesota, MN
| | - Jing Cao
- Department of Laboratory Medicine and Pathology, University of Minnesota, MN
| | - Brian T Steffen
- Department of Laboratory Medicine and Pathology, University of Minnesota, MN
| | - Natalie L Weir
- Department of Laboratory Medicine and Pathology, University of Minnesota, MN
| | - Stephen S Rich
- Center for Public Health Genomics, University of Virginia, Charlottesville, VA
| | - Shuang Liang
- Department of Laboratory Medicine and Pathology, University of Minnesota, MN
| | - Weihua Guan
- Division of Biostatistics, School of Public Health, University of Minnesota, Minneapolis, MN
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Suppression of cell division-associated genes by Helicobacter pylori attenuates proliferation of RAW264.7 monocytic macrophage cells. Sci Rep 2015; 5:11046. [PMID: 26078204 PMCID: PMC4468580 DOI: 10.1038/srep11046] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2014] [Accepted: 05/07/2015] [Indexed: 02/06/2023] Open
Abstract
Helicobacter pylori at multiplicity of infection (MOI ≥ 50) have been shown to cause apoptosis in RAW264.7 monocytic macrophage cells. Because chronic gastric infection by H. pylori results in the persistence of macrophages in the host's gut, it is likely that H. pylori is present at low to moderate, rather than high numbers in the infected host. At present, the effect of low-MOI H. pylori infection on macrophage has not been fully elucidated. In this study, we investigated the genome-wide transcriptional regulation of H. pylori-infected RAW264.7 cells at MOI 1, 5 and 10 in the absence of cellular apoptosis. Microarray data revealed up- and down-regulation of 1341 and 1591 genes, respectively. The expression of genes encoding for DNA replication and cell cycle-associated molecules, including Aurora-B kinase (AurkB) were down-regulated. Immunoblot analysis verified the decreased expression of AurkB and downstream phosphorylation of Cdk1 caused by H. pylori infection. Consistently, we observed that H. pylori infection inhibited cell proliferation and progression through the G1/S and G2/M checkpoints. In summary, we suggest that H. pylori disrupts expression of cell cycle-associated genes, thereby impeding proliferation of RAW264.7 cells, and such disruption may be an immunoevasive strategy utilized by H. pylori.
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16
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Variants in ALOX5, ALOX5AP and LTA4H are not associated with atherosclerotic plaque phenotypes: the Athero-Express Genomics Study. Atherosclerosis 2015; 239:528-38. [PMID: 25721704 DOI: 10.1016/j.atherosclerosis.2015.01.018] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Revised: 01/07/2015] [Accepted: 01/13/2015] [Indexed: 11/22/2022]
Abstract
BACKGROUND The eicosanoid genes ALOX5, ALOX5AP and LTA4H have been implicated in atherosclerosis. We assessed the impact of common variants in these genes on gene expression, circulating protein levels, and atherosclerotic plaque phenotypes. METHODS We included patients from the Stockholm Atherosclerosis Gene Expression study (STAGE, N = 109), and the Athero-Express Biobank Study (AE, N = 1443). We tested 1453 single-nucleotide variants (SNVs) in ALOX5, ALOX5AP and LTA4H for association with gene expression in STAGE. We also tested these SNVs for association with seven histologically defined plaque phenotypes in the AE (which included calcification, collagen, cellular content, atheroma size, and intraplaque vessel density and hemorrhage). RESULTS We replicate a known cis-eQTL (rs6538697, p = 1.96 × 10(-6)) for LTA4H expression in whole blood of patients from STAGE. We found no significant association for any of the SNVs tested with serum levels of ALOX5 or ALOX5AP (p > 5.79 × 10(-4)). For atherosclerotic plaque phenotypes the strongest associations were found for intraplaque vessel density and smooth muscle cells in the ALOX5AP locus (p > 1.67 × 10(-4)). CONCLUSIONS We replicate a known eQTL for LTA4H expression in whole blood using STAGE data. We found no associations of variants in and around ALOX5, ALOX5AP and LTA4H with serum ALOX5 or ALOX5AP levels, or plaque phenotypes. On the supposition that these genes play a causal role in atherosclerosis, these results suggest that common variants in these loci play a limited role (if any) in influencing advanced atherosclerotic plaque morphology to the extent that it impacts atherosclerotic disease.
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Vijayakumar J, Subramanian S, Singh P, Corsini E, Fontanez S, Lawler M, Kaplan R, Brady TJ, Hoffmann U, Tawakol A. Arterial inflammation in bronchial asthma. J Nucl Cardiol 2013; 20:385-95. [PMID: 23526296 DOI: 10.1007/s12350-013-9697-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2012] [Accepted: 02/13/2013] [Indexed: 02/08/2023]
Abstract
BACKGROUND Bronchial asthma is a chronic inflammatory condition associated with increased cardiovascular (CV) events. Here, we assess arterial inflammation, using 18F-fluorodeoxyglucose positron emission tomography/computed tomography imaging (FDG-PET/CT), in patients with bronchial asthma and low to intermediate Framingham risk scores (FRS). METHODS A total of 102 patients underwent FDG-PET/CT imaging for clinical indications. Thirty-four patients (mean age 54.9 ± 16.1) with mild asthma and no known atherosclerotic disease were compared to 2 non-asthmatic groups. The first control group (n = 34) were matched by age, gender, and FRS. The second control group (n = 34) had clinical atherosclerosis and were matched by gender. Thereafter, arterial FDG uptake on PET images was determined, while blinded to patient identifiers. RESULTS Target-to-background-ratio (TBR) in the aorta was higher in asthmatics vs non-asthmatic FRS-matched controls (1.96 ± 0.26 vs 1.76 ± 0.20; P < .001). The aortic TBR remained elevated in asthmatics vs non-asthmatic controls after adjusting traditional CV risk factors (P < .001). An inverse correlation was observed between FDG uptake and lung function, FEV1 (P = .02) and peak flow (P = .03). CONCLUSIONS Bronchial asthma is associated with increased arterial inflammation beyond that estimated by current risk stratification tools. Further studies are required to evaluate whether attenuation of systemic inflammation will decrease CV events.
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Affiliation(s)
- Jayanthi Vijayakumar
- Cardiac MR PET CT Program, Massachusetts General Hospital and Harvard Medical School, Boston, MA, 02114, USA
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18
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Berman JP, Farkouh ME, Rosenson RS. Emerging anti-inflammatory drugs for atherosclerosis. Expert Opin Emerg Drugs 2013; 18:193-205. [DOI: 10.1517/14728214.2013.801453] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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19
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Genome association study of human chromosome 13 and susceptibility to coronary artery disease in a Chinese population. J Genet 2013; 92:85-91. [DOI: 10.1007/s12041-013-0207-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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20
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Di Gennaro A, Haeggström JZ. The leukotrienes: immune-modulating lipid mediators of disease. Adv Immunol 2013; 116:51-92. [PMID: 23063073 DOI: 10.1016/b978-0-12-394300-2.00002-8] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The leukotrienes are important lipid mediators with immune modulatory and proinflammatory properties. Classical bioactions of leukotrienes include chemotaxis, endothelial adherence, and activation of leukocytes, chemokine production, as well as contraction of smooth muscles in the microcirculation and respiratory tract. When formed in excess, these compounds play a pathogenic role in several acute and chronic inflammatory diseases, such as asthma, rheumatoid arthritis, and inflammatory bowel disease. An increasing number of diseases have been linked to inflammation implicating the leukotrienes as potential mediators. For example, recent investigations using genetic, morphological, and biochemical approaches have pointed to the involvement of leukotrienes in cardiovascular diseases including atherosclerosis, myocardial infarction, stroke, and abdominal aortic aneurysm. Moreover, new insights have changed our previous notion of leukotrienes as mediators of inflammatory reactions to molecules that can fine-tune the innate and adaptive immune response. Here, we review the most recent understanding of the leukotriene cascade with emphasis on recently identified roles in immune reactions and pathophysiology.
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Affiliation(s)
- Antonio Di Gennaro
- Department of Medical Biochemistry and Biophysics, Division of Chemistry 2, Karolinska Institutet, Stockholm, Sweden
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21
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Lysgaard C, Nielsen MS, Christensen JH, Lundbye-Christensen S, Riahi S, Schmidt EB. No effect of high-dose atorvastatin on leukotriene B₄ formation from neutrophils in patients treated with coronary bypass surgery: a randomized placebo-controlled double-blinded trial with a crossover design. Prostaglandins Leukot Essent Fatty Acids 2012; 87:185-8. [PMID: 23063168 DOI: 10.1016/j.plefa.2012.09.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2012] [Revised: 09/10/2012] [Accepted: 09/11/2012] [Indexed: 01/13/2023]
Abstract
Inflammation plays a pivotal role in the pathophysiology of cardiovascular disease, (CVD) and leukotrienes may play a role in atherogenesis. Statins reduce mortality from CVD by reducing LDL cholesterol and potentially by other (pleiotropic) mechanisms. The aim of this study was to investigate if atorvastatin exerts an anti-inflammatory effect by reducing leukotriene B₄ (LTB₄) formation from stimulated neutrophils in patients treated with coronary artery bypass grafting. The study was a randomized, placebo-controlled, double-blinded crossover study. Patients (n=80) were allocated to 80 mg atorvastatin or placebo for 6 weeks before crossing over to the opposite treatment for another 6 weeks. There was no significant correlation between baseline LDL cholesterol levels on formation of LTB₄, and atorvastatin had no effect on LTB₄ formation. Hence, this study does not support any effect of atorvastatin on LTB₄ formation as part of the explanation for its beneficial effect on CVD.
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Affiliation(s)
- C Lysgaard
- Department of Cardiology, Center for Cardiovascular Research, Aalborg Hospital, Aarhus University Hospital, Søndre Skovvej 15, Aalborg 9000, Denmark
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22
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Armstrong P, Kelley DS, Newman JW, Staggers FE, Hartiala J, Allayee H, Stephensen CB. Arachidonate 5-lipoxygenase gene variants affect response to fish oil supplementation by healthy African Americans. J Nutr 2012; 142:1417-28. [PMID: 22739369 PMCID: PMC3397335 DOI: 10.3945/jn.112.159814] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Arachidonate 5-lipoxygenase (ALOX5) gene variants that are common in people of African ancestry are associated with a differential cardiovascular disease (CVD) risk that may be ameliorated by intake of (n-3) PUFA, such as EPA or DHA. We conducted a double-masked, placebo (PL)-controlled trial of fish oil (FO) supplements to determine if changes in erythrocyte (n-3) PUFA composition, heart rate, blood pressure, and plasma lipid and lipoprotein concentrations are modified by genotype. Participants received 5 g/d FO (2 g EPA, 1 g DHA) or 5 g/d corn/soy oil (PL). A total of 116 healthy adults of African ancestry with selected genotypes (genotypes = "dd," "d5," and "55" with "d" representing the deletion of 1 or 2 Sp1 binding sites in the ALOX5 promoter and "5" indicating the common allele with 5 sites) were enrolled and 98 completed the study. FO caused significant increases (relative to PL) in erythrocyte EPA, DHA, and total (n-3) PUFA and a decrease in the (n-6) PUFA:(n-3) PUFA ratio in the low-CVD risk "d5" and "55" genotypes but not in the high-risk "dd" genotype. Similarly, HDL particle concentration decreased with FO relative to PL in the "d5" and "55" but not "dd" genotypes. The plasma TG concentration decreased significantly with FO relative to PL in the "d5" but not "dd" and "55" genotypes. No changes were seen in LDL particle or cholesterol concentrations, heart rate, or blood pressure. These findings indicate that the efficacy of FO supplements vary by ALOX5 genotype.
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Affiliation(s)
- Patrice Armstrong
- USDA Western Human Nutrition Research Center, Davis, CA,Department of Nutrition and Program in International and Community Nutrition, University of California, Davis, CA
| | | | | | - Frank E. Staggers
- Ethnic Health Institute of Alta Bates Summit Medical Center, Oakland, CA; and
| | - Janna Hartiala
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA
| | - Hooman Allayee
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA
| | - Charles B. Stephensen
- USDA Western Human Nutrition Research Center, Davis, CA,To whom correspondence should be addressed. E-mail:
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23
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Camacho M, Martinez-Perez A, Buil A, Siguero L, Alcolea S, López S, Fontcuberta J, Souto JC, Vila L, Soria JM. Genetic determinants of 5-lipoxygenase pathway in a Spanish population and their relationship with cardiovascular risk. Atherosclerosis 2012; 224:129-35. [PMID: 22835628 DOI: 10.1016/j.atherosclerosis.2012.07.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2011] [Revised: 06/25/2012] [Accepted: 07/01/2012] [Indexed: 11/29/2022]
Abstract
OBJECTIVE Leukotrienes (LT) play a role in inflammation, cardiovascular diseases, and cancer. Although some studies suggest that there are genes that determine variability of some LT-related phenotypes, the genetic influence on these phenotypes has not been evaluated. METHODS The relative contributions of genetic and environmental influences to the 5-lipoxygenase pathway-related phenotypes (5-Lipoxygenase, five lipoxygenase activating protein (FLAP), LTA(4)-hydrolase and LTC(4)-synthase expression, and LTB(4)-plasma concentration and LTB(4) production by stimulated whole blood) were assessed in a sample of 934 individuals in 35 extended families. Our design is based on extended families recruited through a probands with idiopathic thrombophilia. This strategy allows us the analysis of the effects of measured covariates (such as sex, age and smoking), genes, and environmental variables shared by members of a household. RESULTS All of these phenotypes showed significant genetic contributions, with heritabilities ranging from 0.33 to 0.51 for enzyme expression and from 0.25 to 0.50 for LTB(4) production of the residual phenotypic variance. Significant phenotypic and genetic correlation among the LT-related traits was found. More importantly, FLAP and LTA(4)-hydrolase expression exhibit significant genetic correlations with arterial thrombosis, indicating that some of the genes that influence quantitative variation in these phenotypes also influence the risk of thrombosis. CONCLUSION This is the first study that quantifies the genetic component of 5-Lipoxygenase pathway phenotypes. The high heritability of these traits and the significant genetic correlations between arterial thrombosis and some of these phenotypes suggest that the exploitation of correlated quantitative phenotypes will aid the search for susceptibility genes.
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Affiliation(s)
- Mercedes Camacho
- Laboratory of Angiology, Vascular Biology and Inflammation, Institute of Biomedical Research (II-B Sant Pau), Barcelona, Spain
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24
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Li Y, Li Z, Zhang X, Yan C, Kang J, Liang Z, Liu S, Feng X, Han Y. Association of ALOX5AP haplotypes with susceptibility to coronary artery disease in a Chinese Han population. Eur J Intern Med 2012; 23:e119-23. [PMID: 22726381 DOI: 10.1016/j.ejim.2012.02.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2011] [Revised: 02/14/2012] [Accepted: 02/15/2012] [Indexed: 10/28/2022]
Abstract
BACKGROUND The 5-lipoxygenase activating protein (FLAP), encoded by the activating 5-lipoxygenase (ALOX5AP) gene, is a crucial mediator of the biosynthesis of leukotrienes, which have been implicated in atherosclerosis. This study investigates whether ALOX5AP polymorphisms are associated with coronary artery disease (CAD) in a Chinese Han population. METHODS The promoter, exons, splice site region and 3'-untranslated region of the ALOX5AP gene were sequenced in 48 subjects. Three polymorphic sites (-1340T/G, +8733T/C, +20616G/C) found through sequencing were evaluated in 656 patients with angiographically proven CAD and 678 controls with normal coronary angiograms using a polymerase chain reaction and restriction fragment length polymorphism assay. Allelic, genotypic linkage disequilibrium and haplotypic association testing were performed using SHEsis and LDA software. Binary logistic regression was used to control for the presence of vascular risk factors. RESULTS Seven single nucleotide polymorphisms (SNPs) were found through screening. No significant differences in allele carriers and genotype frequencies of the ALOX5AP polymorphisms were observed between the two groups. However, when the results of the three SNPs were combined, there was a significant association between two of the haplotypes and the risk of CAD. The haplotype GCG had a significantly greater frequency in patients than in controls (P<0.001, OR=1.728, 95%CI=1.375-2.171), and the frequency of haplotype TCG was higher in controls (P<0.001, OR=0.623, 95%CI=0.519-0.748). CONCLUSION The data indicate that ALOX5AP gene variation is a genetic factor associated with interindividual differences in CAD risk.
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Affiliation(s)
- Yi Li
- Xijing Hospital, Fourth Military Medical University, Xi'an, People's Republic of China
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25
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Amirian ES, Ittmann MM, Scheurer ME. Associations between arachidonic acid metabolism gene polymorphisms and prostate cancer risk. Prostate 2011; 71:1382-9. [PMID: 21308720 PMCID: PMC7339922 DOI: 10.1002/pros.21354] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2010] [Accepted: 01/14/2011] [Indexed: 11/06/2022]
Abstract
BACKGROUND The arachidonic acid (AA) pathway is suspected to be involved in the development of various cancers, including prostate cancer. However, the role of single nucleotide polymorphisms (SNPs) of AA pathway genes remains unclear. The purpose of this case-control study was to evaluate the association between prostate cancer risk and 14 such SNPs in the PTGS2, PTGES2, ALOX5, ALOX5AP, and LTA4H genes. METHODS Genotyping was conducted on 585 white prostate cancer cases and 585 healthy, age-matched controls. The best genetic model for each SNP was determined using Akaike's information criterion. Odds ratios for the association between each SNP and prostate cancer risk were calculated, both overall and stratified by obesity (BMI ≥ 30). Haplotype analysis was conducted for the PTGES2 SNPs. RESULTS LTA4H rs1978331 was inversely associated with prostate cancer risk overall (unadjusted, overdominant model OR = 0.68, 95% CI: 0.51-0.91 for TC vs. TT/CC). Among non-obese individuals, the GG genotype of PTGES2 rs10987883 was associated with an increased risk for prostate cancer (unadjusted, recessive model OR = 3.23, 95% CI: 1.27-8.23). CONCLUSIONS Our results indicate that SNPs in certain AA metabolism genes may influence prostate cancer susceptibility. Furthermore, it is possible that obesity, which induces a chronic state of low-level inflammation in addition to several metabolic sequelae, may modify the impact of these SNPs. These findings should be confirmed in a larger study with power to detect differential effects by obesity.
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Affiliation(s)
- E. Susan Amirian
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX USA
| | - Michael M. Ittmann
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX USA
- Dept. of Pathology and Immunology, Baylor College of Medicine, Houston, TX USA
| | - Michael E. Scheurer
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX USA
- Dept. of Pediatrics, Baylor College of Medicine, Houston, TX USA
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26
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Charo IF, Taub R. Anti-inflammatory therapeutics for the treatment of atherosclerosis. Nat Rev Drug Discov 2011; 10:365-76. [PMID: 21532566 DOI: 10.1038/nrd3444] [Citation(s) in RCA: 205] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Atherosclerosis is the primary cause of heart disease and stroke and is thus the underlying pathology of the leading causes of death in the western world. Although risk can be reduced by lowering lipid levels, the equally important contribution of inflammation to the development of cardiovascular disease is not adequately addressed by existing therapies. Here, we summarize the evidence supporting a role for inflammation in the pathogenesis of atherosclerosis, discuss agents that are currently in the clinic and provide a perspective on the challenges faced in the development of drugs that target vascular inflammation.
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Affiliation(s)
- Israel F Charo
- Gladstone Institute of Cardiovascular Disease, 1650 Owens Street #149, San Francisco, California 94158, USA.
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27
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Hartiala J, Li D, Conti DV, Vikman S, Patel Y, Wilson Tang WH, Brennan ML, Newman JW, Stephensen CB, Armstrong P, Hazen SL, Allayee H. Genetic contribution of the leukotriene pathway to coronary artery disease. Hum Genet 2011; 129:617-27. [PMID: 21293878 PMCID: PMC3092945 DOI: 10.1007/s00439-011-0963-3] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2010] [Accepted: 01/27/2011] [Indexed: 12/25/2022]
Abstract
We evaluated the genetic contribution of the leukotriene (LT) pathway to risk of coronary artery disease (CAD) in 4,512 Caucasian and African American subjects ascertained through elective cardiac evaluation. Of the three previously associated variants, the shorter "3" and "4" alleles of a promoter repeat polymorphism in ALOX5 increased risk of CAD in African Americans (OR = 1.4, 95% CI 1.0-1.9; p = 0.04), whereas a haplotype of LTA4H (HapK) was associated with CAD in Caucasians (OR = 1.2, 95% CI 1.01-1.4; p = 0.03). In Caucasians, first-stage analysis of 254 haplotype-tagging SNPs in 15 LT pathway genes with follow-up of 19 variants in stage 2 revealed an LTA4H SNP (rs2540477) that increased risk of CAD (OR = 1.2, 95% CI 1.1-1.5; p = 0.003) and a PLA2G4A SNP (rs12746200) that decreased risk of CAD (OR = 0.7, 95% CI 0.6-0.9; p = 0.0007). The PLA2G4A rs12746200 variant also decreased risk of experiencing a major adverse cardiac event (MACE = myocardial infarction, stroke, or death) over 3 years of follow-up (HR = 0.7, 95% CI 0.5-0.9; p = 0.01), consistent with its cardioprotective effect. Functional experiments demonstrated that stimulated monocytes from carriers of LTA4H variants HapK or rs2540477 had 50% (p = 0.002) and 33% (p = 0.03) higher LTB(4) production, respectively, compared to non-carriers. These ex vivo results are consistent with LTB(4) being the direct product of the reaction catalyzed by LTA4H and its role in promoting monocyte chemotaxis to sites of inflammation, including the artery wall of atherosclerotic lesions. Taken together, this study provides additional evidence that functional genetic variation of the LT pathway can mediate atherogenic processes and the risk of CAD in humans.
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Affiliation(s)
- Jaana Hartiala
- Department of Preventive Medicine, USC Keck School of Medicine, Los Angeles, CA 90033 USA
- Institute for Genetic Medicine, USC Keck School of Medicine, 2250 Alcazar Street, CSC 206, Los Angeles, CA 90033 USA
| | - Dalin Li
- Department of Preventive Medicine, USC Keck School of Medicine, Los Angeles, CA 90033 USA
| | - David V. Conti
- Department of Preventive Medicine, USC Keck School of Medicine, Los Angeles, CA 90033 USA
| | - Susanna Vikman
- Department of Preventive Medicine, USC Keck School of Medicine, Los Angeles, CA 90033 USA
- Institute for Genetic Medicine, USC Keck School of Medicine, 2250 Alcazar Street, CSC 206, Los Angeles, CA 90033 USA
| | - Yesha Patel
- Department of Preventive Medicine, USC Keck School of Medicine, Los Angeles, CA 90033 USA
- Institute for Genetic Medicine, USC Keck School of Medicine, 2250 Alcazar Street, CSC 206, Los Angeles, CA 90033 USA
| | - W. H. Wilson Tang
- Department of Cardiovascular Medicine, Cleveland Clinic, Cleveland, OH 44195 USA
| | - Marie-Louise Brennan
- Department of Cardiovascular Medicine, Cleveland Clinic, Cleveland, OH 44195 USA
- Department of Cell Biology, Cleveland Clinic, Cleveland, OH 44195 USA
- Center for Cardiovascular Diagnostics and Prevention, Cleveland Clinic, Cleveland, OH 44195 USA
| | - John W. Newman
- USDA Western Human Nutrition Research Center, University of California Davis, Davis, CA 95616 USA
| | - Charles B. Stephensen
- USDA Western Human Nutrition Research Center, University of California Davis, Davis, CA 95616 USA
- Program in International and Community Nutrition, Department of Nutrition, University of California Davis, Davis, CA 95616 USA
| | - Patrice Armstrong
- USDA Western Human Nutrition Research Center, University of California Davis, Davis, CA 95616 USA
- Program in International and Community Nutrition, Department of Nutrition, University of California Davis, Davis, CA 95616 USA
| | - Stanley L. Hazen
- Department of Cardiovascular Medicine, Cleveland Clinic, Cleveland, OH 44195 USA
- Department of Cell Biology, Cleveland Clinic, Cleveland, OH 44195 USA
- Center for Cardiovascular Diagnostics and Prevention, Cleveland Clinic, Cleveland, OH 44195 USA
| | - Hooman Allayee
- Department of Preventive Medicine, USC Keck School of Medicine, Los Angeles, CA 90033 USA
- Institute for Genetic Medicine, USC Keck School of Medicine, 2250 Alcazar Street, CSC 206, Los Angeles, CA 90033 USA
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Huang H, Zeng Z, Li J, Zhang L, Chen Y. Variants of arachidonate 5-lipoxygenase-activating protein (ALOX5AP) gene and risk of coronary heart disease: A meta-analysis. Arch Med Res 2011; 41:634-41. [PMID: 21199733 DOI: 10.1016/j.arcmed.2010.11.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2010] [Accepted: 10/21/2010] [Indexed: 02/05/2023]
Abstract
BACKGROUND AND AIMS Previous studies indicated that the arachidonate 5-lipoxygenase-activating protein (ALOX5AP) gene polymorphisms are associated with risk of coronary heart disease (CHD). However, other studies have yielded contradictory results. This meta-analysis investigated the relationship between variants of arachidonate 5-lipoxygenase-activating protein (ALOX5AP) gene and CHD. METHODS We identified all studies published before January 2010 through computer-based searches of PubMed, EMBASE, Google Scholar databases, and CNKI (Chinese National Knowledge Infrastructure). Data were extracted by two authors and pooled odds ratio (OR) and 95% confidence interval (CI) were calculated. RESULTS In this meta-analysis, HapA haplotype (rs17222814G-rs10507391T-rs4769874G-rs9551963A) was associated with myocardial infarction (MI) (OR = 1.37, 95% CI: 1.02-1.82). Regarding the HapB haplotype (rs17216473A-rs10507391A- rs9315050A- rs17222842G), there was a significant association with CHD (OR = 1.33, 95% CI: 1.10-1.62). For the rs17222814, rs10507391, rs4769874, rs9551963, rs17216473, rs9315050 and rs9579646 polymorphisms, there were no associations with CHD. For the rs17222842 polymorphism, there was a marginal association with the risk of CHD (OR = 1.17, 95% CI: 1.00-1.36). CONCLUSIONS In this meta-analysis, the HapB haplotype and rs1722842 polymorphism in ALOX5AP gene were associated with CHD, and the HapA haplotype was associated with risk of MI. The HapB haplotype may be a predictor to the risk of CHD.
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Affiliation(s)
- Hao Huang
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, P.R. China
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29
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Stephensen CB, Armstrong P, Newman JW, Pedersen TL, Legault J, Schuster GU, Kelley D, Vikman S, Hartiala J, Nassir R, Seldin MF, Allayee H. ALOX5 gene variants affect eicosanoid production and response to fish oil supplementation. J Lipid Res 2011; 52:991-1003. [PMID: 21296957 DOI: 10.1194/jlr.p012864] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The objective of this study was to determine whether 5-lipoxygenase (ALOX5) gene variants associated with cardiovascular disease affect eicosanoid production by monocytes. The study was a randomized, double-masked, parallel intervention trial with fish oil (5.0 g of fish oil daily, containing 2.0 g of eicosapentaenoic acid [EPA] and 1.0 g of docosahexaenoic acid [DHA]) or placebo oil (5.0 g of corn/soy mixture). A total of 116 subjects (68% female, 20-59 years old) of African American ancestry enrolled, and 98 subjects completed the study. Neither ALOX5 protein nor arachidonic acid-derived LTB4, LTD4, and LTE4 varied by genotype, but 5-hydroxyeicosatetraenoate (5-HETE), 6-trans-LTB4, 5-oxo-ETE, 15-HETE, and 5,15-diHETE levels were higher in subjects homozygous for the ALOX5 promoter allele containing five Sp1 element tandem repeats ("55" genotype) than in subjects with one deletion (d) (three or four repeats) and one common ("d5" genotype) allele or with two deletion ("dd") alleles. The EPA-derived metabolites 5-HEPE and 15-HEPE and the DHA-derived metabolite 17-HDoHE had similar associations with genotype and increased with supplementation; 5-HEPE and 15-HEPE increased, and 5-oxo-ETE decreased to a greater degree in the 55 than in the other genotypes. This differential eicosanoid response is consistent with the previously observed interaction of these variants with dietary intake of omega-3 fatty acids in predicting cardiovascular disease risk.
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Affiliation(s)
- Charles B Stephensen
- Western Human Nutrition Research Center, US Department of Agriculture, Davis, CA 95616, USA.
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30
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Assimes TL, Hólm H, Kathiresan S, Reilly MP, Thorleifsson G, Voight BF, Erdmann J, Willenborg C, Vaidya D, Xie C, Patterson CC, Morgan TM, Burnett MS, Li M, Hlatky MA, Knowles JW, Thompson JR, Absher D, Iribarren C, Go A, Fortmann SP, Sidney S, Risch N, Tang H, Myers RM, Berger K, Stoll M, Shah SH, Thorgeirsson G, Andersen K, Havulinna AS, Herrera JE, Faraday N, Kim Y, Kral BG, Mathias RA, Ruczinski I, Suktitipat B, Wilson AF, Yanek LR, Becker LC, Linsel-Nitschke P, Lieb W, König IR, Hengstenberg C, Fischer M, Stark K, Reinhard W, Winogradow J, Grassl M, Grosshennig A, Preuss M, Schreiber S, Wichmann HE, Meisinger C, Yee J, Friedlander Y, Do R, Meigs JB, Williams G, Nathan DM, MacRae CA, Qu L, Wilensky RL, Matthai WH, Qasim AN, Hakonarson H, Pichard AD, Kent KM, Satler L, Lindsay JM, Waksman R, Knouff CW, Waterworth DM, Walker MC, Mooser VE, Marrugat J, Lucas G, Subirana I, Sala J, Ramos R, Martinelli N, Olivieri O, Trabetti E, Malerba G, Pignatti PF, Guiducci C, Mirel D, Parkin M, Hirschhorn JN, Asselta R, Duga S, Musunuru K, Daly MJ, Purcell S, Eifert S, Braund PS, Wright BJ, Balmforth AJ, Ball SG, Ouwehand WH, Deloukas P, Scholz M, Cambien F, Huge A, Scheffold T, Salomaa V, Girelli D, Granger CB, Peltonen L, McKeown PP, Altshuler D, Melander O, Devaney JM, Epstein SE, Rader DJ, Elosua R, Engert JC, Anand SS, Hall AS, Ziegler A, O'Donnell CJ, Spertus JA, Siscovick D, Schwartz SM, Becker D, Thorsteinsdottir U, Stefansson K, Schunkert H, Samani NJ, Quertermous T. Lack of association between the Trp719Arg polymorphism in kinesin-like protein-6 and coronary artery disease in 19 case-control studies. J Am Coll Cardiol 2010; 56:1552-63. [PMID: 20933357 PMCID: PMC3084526 DOI: 10.1016/j.jacc.2010.06.022] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2009] [Revised: 06/14/2010] [Accepted: 06/22/2010] [Indexed: 11/27/2022]
Abstract
OBJECTIVES We sought to replicate the association between the kinesin-like protein 6 (KIF6) Trp719Arg polymorphism (rs20455), and clinical coronary artery disease (CAD). BACKGROUND Recent prospective studies suggest that carriers of the 719Arg allele in KIF6 are at increased risk of clinical CAD compared with noncarriers. METHODS The KIF6 Trp719Arg polymorphism (rs20455) was genotyped in 19 case-control studies of nonfatal CAD either as part of a genome-wide association study or in a formal attempt to replicate the initial positive reports. RESULTS A total of 17,000 cases and 39,369 controls of European descent as well as a modest number of South Asians, African Americans, Hispanics, East Asians, and admixed cases and controls were successfully genotyped. None of the 19 studies demonstrated an increased risk of CAD in carriers of the 719Arg allele compared with noncarriers. Regression analyses and fixed-effects meta-analyses ruled out with high degree of confidence an increase of ≥2% in the risk of CAD among European 719Arg carriers. We also observed no increase in the risk of CAD among 719Arg carriers in the subset of Europeans with early-onset disease (younger than 50 years of age for men and younger than 60 years of age for women) compared with similarly aged controls as well as all non-European subgroups. CONCLUSIONS The KIF6 Trp719Arg polymorphism was not associated with the risk of clinical CAD in this large replication study.
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Affiliation(s)
- Themistocles L Assimes
- Department of Medicine, Stanford University School of Medicine, Stanford, California 94304-1334, USA.
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Tardif JC, L'allier PL, Ibrahim R, Grégoire JC, Nozza A, Cossette M, Kouz S, Lavoie MA, Paquin J, Brotz TM, Taub R, Pressacco J. Treatment with 5-lipoxygenase inhibitor VIA-2291 (Atreleuton) in patients with recent acute coronary syndrome. Circ Cardiovasc Imaging 2010; 3:298-307. [PMID: 20190281 DOI: 10.1161/circimaging.110.937169] [Citation(s) in RCA: 111] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
BACKGROUND Production of leukotrienes by 5-lipoxygenase (5-LO) has been linked to unstable atherosclerotic plaques and cardiovascular events. VIA-2291 is a potent 5-LO inhibitor. METHODS AND RESULTS In a double-blinded study, 191 patients were randomly assigned 3 weeks after an acute coronary syndrome to receive 25, 50, or 100 mg VIA-2291 or placebo daily for 12 weeks. The primary study end point, whole blood stimulated leukotriene LTB4 at trough drug level, was reduced in all VIA-2291 groups (P<0.0001) in a dose-dependent fashion, with approximately 80% inhibition in >90% of patients in the 100-mg group. A significant reduction of urine leukotriene LTE4 was obtained in all dose groups. No serious adverse events were considered related to study drug. A subset of 93 patients who had undergone a 64-slice coronary CT examination at baseline continued on study medication for a total of 24 weeks and underwent a repeat scan. Five of these patients withdrew or were noncompliant and 28 had nonevaluable scans. Among the 60 remaining patients, new coronary plaques were observed in 5 of 18 (27.8%) placebo-treated patients and in 2 of 42 (4.8%) VIA-2291-treated patients (P=0.01). A reduction in noncalcified plaque volume at 24 weeks versus placebo was observed in VIA-2291-treated groups in the 34 of these 60 patients in whom this end point was analyzable (P<0.01). CONCLUSIONS VIA-2291 reduces leukotriene production at 12 weeks after an acute coronary syndrome. Preliminary data from the CT substudy suggest that such a reduction in leukotriene production may influence atherosclerosis; however, this requires confirmation in a larger study. Clinical Trial Registration- URL: http://www.clinicaltrials.gov. Unique identifier: NCT00358826.
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Affiliation(s)
- Jean-Claude Tardif
- Department of Medicine, Radiology, Montreal Heart Institute and Université de Montréal, Montreal, Canada
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Affiliation(s)
- C. Thomas Caskey
- The Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center, Houston, Texas 77030;
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Hersberger M. Potential role of the lipoxygenase derived lipid mediators in atherosclerosis: leukotrienes, lipoxins and resolvins. Clin Chem Lab Med 2010; 48:1063-73. [DOI: 10.1515/cclm.2010.212] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Tsai AK, Li N, Hanson NQ, Tsai MY, Tang W. Associations of genetic polymorphisms of arachidonate 5-lipoxygenase-activating protein with risk of coronary artery disease in a European–American population. Atherosclerosis 2009; 207:487-91. [DOI: 10.1016/j.atherosclerosis.2009.06.018] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2009] [Revised: 06/11/2009] [Accepted: 06/12/2009] [Indexed: 12/21/2022]
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Allayee H, Roth N, Hodis HN. Polyunsaturated fatty acids and cardiovascular disease: implications for nutrigenetics. JOURNAL OF NUTRIGENETICS AND NUTRIGENOMICS 2009; 2:140-8. [PMID: 19776641 DOI: 10.1159/000235562] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Cardiovascular disease (CVD) arises as a result of genetic predisposition in the context of a disease-promoting environment. While several risk factors have been identified for CVD, such as elevated serum lipid levels and hypertension, most of the genes identified thus far do not appear to involve such 'conventional' risk factors. Moreover, the interactions between genes and environment, such as a diet high in certain fats, adds another level of complexity to CVD and renders identification of the underlying genetic factors even more difficult. Polyunsaturated fatty acids (PUFAs), such as the omega-6 and omega-3 fatty acids, which have multiple roles in membrane structure, lipid metabolism, blood clotting, blood pressure, and, in particular, inflammation, have been linked to the reduction in CVD. Linoleic (omega-6) and alpha-linolenic acid (omega-3) are essential fatty acids that can be converted into long-chain PUFAs, such as arachidonic acid (AA) and eicosapentaenoic acid (EPA)/docosahexaenoic acid (DHA), respectively. These long-chain PUFAs are metabolized by enzymatically catalyzed systems via cyclooxygenases and lipoxygenases. The 5-lipoxygenase (5-LO)/leukotriene (LT) biosynthesis pathway has been biochemically and genetically associated with CVD traits in mice and humans, particularly in the context of dietary AA and EPA/DHA. In this review, we summarize the biochemical metabolism of omega-3 and omega-6 PUFAs, evaluate the evidence for genetic and nutrigenetic contributions of 5-LO pathway genes to CVD, and discuss the potential of future studies that could identify other gene-dietary interactions between PUFAs and CVD traits.
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Affiliation(s)
- Hooman Allayee
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, 2250 Alcazar Street, Los Angeles, CA 90033, USA.
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Dandona S, Roberts R. Creating a genetic risk score for coronary artery disease. Curr Atheroscler Rep 2009; 11:175-81. [PMID: 19361348 DOI: 10.1007/s11883-009-0028-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Coronary artery disease (CAD) and its sequelae represent a significant health burden. Over the past two decades, numerous studies have attempted to link DNA sequence variation with the risk of CAD and related phenotypes. There has been significant evolution in technology from the early linkage studies within kindreds, and now we are able to use high-density genotyping to facilitate large-scale genome-wide association studies. The first novel genetic risk factor for CAD, 9p21.3, has been confirmed, and other loci are awaiting replication studies. The relative importance of each locus from a global standpoint and the incremental information conferred by testing for genetic variants remain to be determined.
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Affiliation(s)
- Sonny Dandona
- University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, Ontario K1Y4W7, Canada.
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37
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Schentrup AM, Allayee H, Lima JJ, Johnson JA, Langaee TY. Genotyping the GGGCGG tandem repeat promoter polymorphism in the 5-lipoxygenase enzyme gene (ALOX5) by pyrosequencing assay. Genet Test Mol Biomarkers 2009; 13:361-5. [PMID: 19473080 DOI: 10.1089/gtmb.2008.0103] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
AIMS Efficient genotyping methods for many biologically significant repeat genetic polymorphisms, particularly in GC-rich regions of the genome, are limited. In particular, a short tandem repeat polymorphism [GGCGGG] in the promoter region of ALOX5 has been implicated as an important marker for inflammatory diseases. We developed a pyrosequencing assay to genotype the ALOX5 short tandem repeat polymorphism using pyrosequencing technology that will make assessing this important genetic marker in large, diverse populations more accessible than using current methods. MATERIALS AND METHODS We used a nested polymerase chain reaction approach to amplify DNA for pyrosequencing. Population allele frequencies were assessed in two cohorts of previously collected human DNA samples with 188 and 1032 samples, respectively. Sixteen genetic samples with known genotypes were used to confirm the accuracy of the method. RESULTS AND DISCUSSION Genotypes were 100% concordant with samples of known genotype. Genotype frequencies in European American, Hispanic, and African American agreed with previously published results (wild-type homozygotes 66%, 64%, and 19%, respectively). The method presented here will facilitate both genetic association and pharmacogenomic research on this polymorphism in large samples that are ethnically and/or racially admixed.
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Affiliation(s)
- Anzeela M Schentrup
- Center for Pharmacogenomics, College of Pharmacy, University of Florida, Gainesville, Florida 32610, USA
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39
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Roy H, Bhardwaj S, Yla-Herttuala S. Molecular genetics of atherosclerosis. Hum Genet 2009; 125:467-91. [DOI: 10.1007/s00439-009-0654-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2008] [Accepted: 03/04/2009] [Indexed: 12/17/2022]
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40
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Tousoulis D, Briasoulis A, Papageorgiou N, Antoniades C, Stefanadis C. Candidate gene polymorphisms and the 9p21 locus in acute coronary syndromes. Trends Mol Med 2008; 14:441-9. [PMID: 18786860 DOI: 10.1016/j.molmed.2008.08.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2008] [Revised: 08/01/2008] [Accepted: 08/01/2008] [Indexed: 12/19/2022]
Abstract
It is now widely accepted that the classic environmental risk factors for atherosclerosis only partly explain the incidence of coronary artery disease and the development of acute coronary syndromes. Therefore, genetic factors that vary among human populations seem to be involved in the clinical manifestations of such patients. Substantial data suggest that a significant proportion of genetic polymorphisms involved in endothelial function, inflammation, lipid metabolism, thrombosis and fibrinolysis are often present in patients with acute coronary syndromes. In particular, a common variant on chromosome 9p21 was recently identified to affect the risk of myocardial infarction. Here, we review the progress of candidate gene studies and genome-wide association studies in identifying the genetic bases of complex cardiovascular diseases such as acute coronary syndromes.
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Affiliation(s)
- Dimitris Tousoulis
- 1st Cardiology Unit, Hippokration Hospital, Athens University Medical School, 16675 Glifada, Athens, Greece.
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